speedlify2

Lighthouse lab metrics, Axe, and Chrome UX Report field data for a list of sites recorded and compared over time. Follow us on Mastodon or Bluesky.

Charts Compare Measurement runs Embed a score Open to Work

deepseek.com

https://www.deepseek.com/

45PERF 87A11Y 81BEST 92SEO ✗AXE ✓CWV

Ranks Overall #1,747 Developer Tooling #87 AI #9

Data from Oct 16, 2026, 5:34 AM UTC old Measured every 2 days · 21 runs since Aug 31, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Tame the Bots · Scoring Calculator · Wayback Machine

This URL redirects to https://www.deepseek.com/en/.

The site’s front door pointing at the page it serves there — a locale or CMS landing path, not a move. The origin is still the address of the site, so history stays under it rather than forking to a path that depends on where the measurement ran. Lighthouse follows the redirect, so the numbers below describe the page actually served; the only cost is an extra hop on each run.

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Next.js Built with Next.js
Uses ReactReact
Amazon S3 Hosted by Amazon S3

Filmstrip LAB Throttled

How the page drew during the measured load, at 9 points across 17.24 s. Compare this filmstrip against another site.

  1. 2.15 s
  2. 4.31 s
  3. 5.00 s
  4. 6.46 s
  5. 8.62 s
  6. 10.78 s
  7. 12.93 s
  8. 15.09 s
  9. 17.24 s

Lighthouse Scores LAB Simulated

45
Performance
↑ +9 (+25%)
87
Accessibility
no change
81
Best Practices
no change
92
SEO
no change

Metrics LAB FIELD

Core Web Vitals: passing 3 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-16 → 2026-10-13), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 7.40 s poor ↓ -1911 ms (-20.5%) significant 4.37 s – 10.26 s 2.23 s good 81.4% 13.3% 5.3%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 109 ms good 91.1% 7.1% 1.8%
CLS CWV Cumulative Layout Shift 0 good → no change 0 – 0 0 good 99.1% 0.6% 0.3%
TBT Total Blocking Time 8.41 s poor ↓ -1868 ms (-18.2%) significant 245 ms – 10.28 s n/a —
FCP First Contentful Paint 1.35 s good ↓ -2447 ms (-64.4%) significant 1.35 s – 5.67 s 1.56 s good 81.1% 12.1% 6.9%
Speed Index 3.56 s needs work ↓ -634 ms (-15.1%) significant 2.54 s – 6.04 s n/a —
TTFB Time to First Byte 605 ms good ↑ +1 ms (+0.2%) 601 ms – 613 ms 750 ms good 76.8% 15.3% 7.9%

LCP LAB Simulated vs LCP FIELD

Lab 7.40 s
Field p75 2.23 s

The lab LCP is 3.32× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 857 kB ↓ -395.9 kB (-32.1%) significant 716 kB – 1.42 MB
Requests 72 ↓ -5 (-6.5%) significant 58 – 85
Third-party Weight 0 B ↓ -121.0 kB (-100%) significant 0 B – 314 kB
Third-party CPU 0 ms → no change 0 ms – 38 ms
Unused JS 79.5 kB ↓ -245.6 kB (-76%) significant 79.5 kB – 382 kB
Unused CSS 0 B → no change 0 B – 0 B

By resource type

Type Transfer Share Size Requests
script 52.6% 340 kB 41
image 21.5% 139 kB 6
font 9.7% 63.0 kB 4
document 9% 58.0 kB 2
other 4.4% 28.3 kB 11
stylesheet 2.9% 18.8 kB 7
Total 857 kB 72

Without JavaScript

This page is client rendered.

Nothing was painted until the scripts ran. This is a web performance and robustness issue!

The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.

Scripts disabled
As rendered

61.9% of pixels differ — the page changes substantially. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Page health

Metric Value Change / range Trend
Main Thread Work 13.48 s ↓ -3546 ms (-20.8%) significant 2.44 s – 17.03 s
Long Tasks 20 → no change 5 – 20
DOM Elements 5 — 5 – 5
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 8 → no change 6 – 10
A11y Failures 3 → no change 3 – 4
A11y Failing Nodes 6 → no change 6 – 8

Main thread work

Task Time Share Duration Simulated
other 89% 12.02 s
script evaluation 7% 941 ms
style layout 2% 237 ms
script parse compile 1% 180 ms
paint composite render 0% 38 ms
parse HTML 0% 33 ms
garbage collection 0% 32 ms
Total 13.48 s

Axe violations axe-core 4.13.0, full rule set

8 violating nodes across 4 rules, 359 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • critical button-name — Buttons must have discernible text 3 nodes
    Offending elements
    1. .md\:hidden.w-10.h-10 
      <button class="md:hidden flex items-center justify-center w-10 h-10 text-ds-primary"><svg width="24" height="24" viewBox="0 0 24 24" fill="none"><path d="M3 6h18M3 12h18M3 18h18" stroke="currentColor…
    2. .ds-mobile-menu-header > .w-10.h-10.text-ds-primary 
      <button class="flex items-center justify-center w-10 h-10 text-ds-primary"><svg width="24" height="24" viewBox="0 0 24 24" fill="none"><path d="M6 6l12 12M6 18L18 6" stroke="currentColor" stroke-widt…
    3. .ds-hero-send-btn 
      <button type="button" class="ds-hero-send-btn flex-shrink-0 flex items-center justify-center w-9 h-9 rounded-full overflow-hidden border-none bg-[var(--ds-color-brand-medium-reverse)] text-white curs…
  • serious link-name — Links must have discernible text 2 nodes
    Offending elements
    1. .shrink-0.text-\[var\(--ds-color-brand-medium-reverse\)\][href$="en/"] 
      <a class="flex items-center shrink-0 text-[var(--ds-color-brand-medium-reverse)]" href="/en/">
    2. .ds-mobile-menu-header > .text-\[var\(--ds-color-brand-medium-reverse\)\].items-center[href$="en/"] 
      <a class="flex items-center text-[var(--ds-color-brand-medium-reverse)]" href="/en/">
  • moderate region — All page content should be contained by landmarks 2 nodes
    Offending elements
    1. .cookie_banner-title 
      <div class="cookie_banner-title">Cookie Settings</div>
    2. .cookie_banner-description 
      <div class="cookie_banner-description">
  • serious aria-prohibited-attr — Elements must only use permitted ARIA attributes 1 node
    Offending element
    1. .cursor-default 
      <span class="w-8 h-8 flex items-center justify-center text-ds-secondary hover:text-ds-primary transition-colors cursor-default" aria-label="WeChat">

Accessibility failures 3 of 25 audits

  • button-name — Buttons do not have an accessible name 3 nodes
  • link-name — Links do not have a discernible name 2 nodes
  • aria-prohibited-attr — Elements use prohibited ARIA attributes 1 node

Best Practices failures 1 of 19 audits

  • deprecations — Uses deprecated APIs 1 item

SEO failures 1 of 10 audits

  • link-text — Links do not have descriptive text 1 item

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending LCPINPCLSFCPTTFB
2026-10-10 2.21 s 109 ms 0 1.53 s 775 ms
2026-10-03 2.16 s 107 ms 0 1.48 s 779 ms
2026-09-26 2.04 s 106 ms 0 1.44 s 779 ms
2026-09-19 1.92 s 106 ms 0 1.45 s 779 ms
2026-09-12 1.76 s 107 ms 0 1.46 s 782 ms
2026-09-05 1.69 s 132 ms 0 1.66 s 769 ms
2026-08-29 1.72 s 140 ms 0 1.70 s 754 ms
2026-08-22 1.74 s 143 ms 0 1.73 s 741 ms
2026-08-15 1.76 s 144 ms 0 1.75 s 721 ms
2026-08-08 1.78 s 145 ms 0 1.76 s 724 ms
2026-08-01 1.79 s 145 ms 0 1.78 s 730 ms
2026-07-25 1.82 s 146 ms 0 1.80 s 740 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 16, 2026, 5:34 AM UTC 45 7.40 s 0 8.41 s 857 kB 3/3 ±16 2,463 -1% 182.1s Wayback
Oct 14, 2026, 12:54 AM UTC 36 9.31 s 0 10.28 s 1.26 MB 3/3 ±19 4,263 +71% 63.2s Wayback
Oct 8, 2026, 11:14 PM UTC 35 9.20 s 0 8.32 s 1.25 MB 3/3 ±6 2,453 -1% 187.7s Wayback
Oct 6, 2026, 7:03 PM UTC 34 8.46 s 0 8.40 s 1.26 MB 3/3 ±6 3,244 +30% 64.6s Wayback
Oct 3, 2026, 5:56 PM UTC 32 9.88 s 0 7.20 s 1.21 MB 3/3 ±4 2,473 -1% 185s Wayback
Sep 30, 2026, 8:34 PM UTC 31 10.26 s 0 6.79 s 1.42 MB 3/3 ±4 2,499 0% 195.6s Wayback
Sep 28, 2026, 6:36 PM UTC 45 6.06 s 0 8.11 s 920 kB 3/3 ±9 2,447 -2% 63.6s Wayback
Sep 25, 2026, 12:37 AM UTC 43 6.98 s 0 7.57 s 896 kB 3/3 ±7 2,962 +19% 62.5s Wayback
Sep 23, 2026, 12:02 AM UTC 43 7.41 s 0 8.96 s 913 kB 3/3 ±8 2,480 0% 183s Wayback
Sep 20, 2026, 11:12 PM UTC 44 6.67 s 0 8.28 s 889 kB 3/3 ±9 2,494 0% 182.2s Wayback
Sep 18, 2026, 1:51 PM UTC 44 7.05 s 0 8.27 s 886 kB 3/3 ±11 2,476 0% 185.9s Wayback
Sep 16, 2026, 9:32 AM UTC 43 7.26 s 0 8.87 s 818 kB 3/3 ±7 2,475 -1% 189.2s Wayback
Sep 14, 2026, 6:15 AM UTC 44 6.83 s 0 9.34 s 813 kB 3/3 ±8 2,546 +2% 182.4s Wayback
Sep 11, 2026, 11:20 PM UTC 43 6.79 s 0 9.10 s 802 kB 3/3 ±8 2,457 -1% 182.2s Wayback
Sep 9, 2026, 8:28 PM UTC 40 7.40 s 0 9.17 s 816 kB 3/3 ±8 2,189 -12% 40.9s Wayback
Sep 7, 2026, 7:02 PM UTC 43 7.38 s 0 8.70 s 802 kB 3/3 ±9 2,345 -6% 38.7s Wayback
Sep 5, 2026, 12:31 PM UTC 44 6.83 s 0 9.14 s 810 kB 3/3 ±8 2,207 -11% 39.3s Wayback
Sep 4, 2026, 1:07 AM UTC 70 5.31 s 0 384 ms 730 kB 3/3 ±9 2,344 -6% 35.7s Wayback
Sep 2, 2026, 11:17 PM UTC 79 4.43 s 0 245 ms 716 kB 3/3 ±17 3,002 +21% 31.7s Wayback
Sep 1, 2026, 10:56 PM UTC 74 4.37 s 0 413 ms 730 kB 3/3 ±17 2,345 -6% 34.3s Wayback
Aug 31, 2026, 9:09 PM UTC 70 5.29 s 0 406 ms 739 kB 3/3 ±18 2,350 -6% 36.3s Wayback